These RetroSound speakers are a great way to upgrade the sound system in your Porsche. RetroSound speakers feature a neodymium magnet structure -- more than twice as powerful as the ferrite magnets found in most speakers. As a result, these speakers are powerful, yet ultra-thin to fit in tight spaces. RetroSound speakers feature Santoprene® surrounds for a smooth, natural sound and mylar tweeters for crisp, clear highs. You can't find a better sounding or more reliable speaker for your Porsche.